Animation Nodes - Control several objects of a group
Most nodes of Animation Nodes 2 were vectorized, which means that most nodes work on a list of values without using a loop. This applies to the Object ID Key node as well as the Matrix Output node.

Instead of feeding the From Group node into a loop to extract the initial transformations individually from each object, you can feed the From Group directly into the Object ID Key node and it will give you a list of all initial transformations automatically. Then you can feed the list – again without using a loop – into the Offset Matrix node to receive a list of all transformed matrices.



You only have to make sure that


the origin of each letter is close to the letter so that the object controller falloff can correctly calculate how far away the letters are from the controller. Merely separating the letters of a text object will keep the origins at the location of the original text object.
And each letter has the initial transforms stored. The Initial transforms for an object can be stored in the tool panel shown in the image below.